WO2013154723A1 - Printed encapsulation - Google Patents
Printed encapsulation Download PDFInfo
- Publication number
- WO2013154723A1 WO2013154723A1 PCT/US2013/030717 US2013030717W WO2013154723A1 WO 2013154723 A1 WO2013154723 A1 WO 2013154723A1 US 2013030717 W US2013030717 W US 2013030717W WO 2013154723 A1 WO2013154723 A1 WO 2013154723A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- insert
- layer
- polymeric
- machine
- layers
- Prior art date
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/112—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/188—Processes of additive manufacturing involving additional operations performed on the added layers, e.g. smoothing, grinding or thickness control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
Definitions
- the present disclosure relates generally to part manufacturing and more particularly to printed encapsulation of an insert.
- polymeric parts are made by injection or extrusion molding.
- a heated polymeric liquid is inserted into match metal dies under high pressure, after which the dies are internally cooled in order to cure the manufactured parts. Air is vented from the die cavity when the molten polymer is injected therein.
- Injection and extrusion molding are ideally suited for high volume production where one hundred thousand or more parts per year are required.
- These traditional manufacturing processes disadvantageously require very expensive machined steel dies, which are difficult and time consuming to modify if part revisions are desired, and are subject to problematic part-to-part tolerance variations. Such variations are due to molding shrinkage during curing, molding pressure differences, part warpage due to internal voids and external sink marks, and the like. The expense of this traditional die tooling makes lower volume production of polymeric parts prohibitively expensive.
- insert molding is known.
- Traditional insert molding requires a metallic insert to be placed between the match metal dies such as on a shuttle press, the dies are closed and then the liquid polymer is injected under high pressure to surround the desired sections of the insert in the mold. Nevertheless, at least some portions of the insert must be exposed from the polymer so the insert can contact against and be held by the dies during molding. This tooling is expensive and part-to-part tolerance variation is a concern given the high pressure liquid pressing against often unsupported sections of the inserts.
- a printed encapsulation method and part are provided.
- a part includes a prefabricated insert against which are layers of an additive polymeric material.
- Another aspect uses a three-dimensional printing machine to emit material from an ink jet printing head to build up material attached to an insert.
- a further aspect provides a method of making a part by depositing material in layers and/or a built-up arrangement attached to an insert.
- the present printed encapsulation method and part are advantageous over traditional devices.
- the present method and part do not require any unique tooling or dies, thereby saving hundreds of thousands of dollars and many weeks of die manufacturing time.
- the present method allows for quick and inexpensive design and part revisions from one manufacturing cycle to another.
- part-to-part tolerance variations are essentially non-existent with the present method and part such that at least ten, and more preferably at least forty, identical parts can be produced in a single machine manufacturing cycle.
- the present method and part are advantageously capable of creating die-locked part configurations that would otherwise be expensive to produce with conventional insert molding dies. Additional advantages and features of the present invention can be found in the following description and appended claims as well as in the accompanying drawings.
- Figure 1 is a top elevational view showing a washer embodiment of the present invention
- Figure 2 is a side elevational view showing the washer embodiment
- Figure 3 is a cross-sectional view, taken along line 3-3 of Figure
- Figure 4 is a top elevational view showing a cap embodiment of the present invention.
- Figure 5 is a side elevational view showing the cap embodiment
- Figure 6 is a cross-sectional view, taking along line 6-6 of
- Figure 7 is a top elevational view showing a nut embodiment of the present invention.
- Figure 8 is a cross-sectional view, taking along line 8-8 of Figure 7, showing the nut embodiment
- Figure 9 is a side elevational view showing the nut embodiment
- Figure 10 is a top elevational view showing a bezel and window embodiment of the present invention.
- Figure 1 1 is a cross-sectional view, taken along line 1 1 -1 1 of Figure 10, showing the bezel and window embodiment;
- Figure 12 is a top elevational view showing an electrical circuit embodiment of the present invention.
- Figure 13 is a side elevational view showing the electrical circuit embodiment
- Figure 14 is an end elevational view, taken in the direction of arrow 14 from Figure 12, showing the electrical circuit embodiment
- Figure 15 is a fragmentary end elevational view, taken in the direction of arrow 15 from Figure 12, showing the electrical circuit embodiment
- Figure 16 is a cross-sectional view, taken along line 16-16 of Figure 12, showing the electrical circuit embodiment
- Figure 17 is a diagrammatic top view showing a fabric embodiment of the present invention.
- Figure 18 is a diagrammatic side view showing the fabric embodiment
- Figure 19 is a diagrammatic cross-sectional view, taken along line 19-19 of Figure 17, showing the textile embodiment;
- Figure 20 is a perspective view showing a machine manufacturing the washer and bezel/window embodiment parts, with an upper cover of the machine removed;
- Figures 21 A-D are a series of diagrammatic side views showing the machine building up the washer and bezel/window embodiment parts.
- a print encapsulated washer part 31 includes a rigid metal insert 33 surrounded by a three-dimensionally printed polymeric cover 35.
- Insert 33 is a prefabricated component stamped from sheet steel and having a circular peripheral surface 37, a concentric circular inner surface 39 defining a through-hole 45, and a pair of generally flat top and bottom surfaces 41 and 43.
- Polymeric cover 35 has a final shape matching that of the insert 33 but with the additional thickness of the polymeric material thereupon. It should be alternately appreciated, however, that the peripheral and inner shapes of the insert and/or polymeric cover can be polygonal, have gear teeth, be eccentric or have various other shapes, although certain of the present advantages may not be realized.
- polymer cover 35 is at least 2 mm thick adjacent inner and peripheral surfaces 39 and 37, respectively.
- prefabricated means manufactured prior to the polymer printing process.
- the three-dimensionally printed polymeric cover 35 is preferably a DM 9840 printable material although DM 9860 or VeroWhite printable polymers may alternately be employed.
- Polymeric cover 35 is somewhat flexible after printing and curing, and certainly more flexible than the rigid insert located therein. Therefore, washer 31 is ideally suited to seal an aperature around a bolt, tube, wire or other member extending through central hole 45 therein. It is believed that the entire and complete polymeric encapsulation of the steel insert deters and prevents the insert from rusting after at least 1 ,000 hours of a salt spray test. Accordingly, washer 31 is perfectly suited for use in a marine environment such as on a boat, off-shore oil platform, dock, sea water pump, or other such use.
- Figures 4-6 illustrate a cap part 61 which serves as an aesthetically pleasing cover of a screw or axle head extending through a wheel of a toy.
- Cap 61 preferably has a frusto-conically tapered sidewall 63 ending at a centrally enclosed end 65.
- An offset and enlarged end 67 is openly accessible and includes a receptacle cavity 69 therein.
- a circular flange 71 laterally extends outboard from end 67.
- Cap 61 includes a cup-shaped and concave metallic insert 81 partially encapsulated by a three-dimensionally printed polymeric cover 83.
- Insert 81 is a prefabricated component preferably stamped from sheet steel 1050-1065, heat treated to 44-51 Rc, of 0.025 inches thickness.
- Inwardly extending prongs or snap fingers 85 are locally stamped inwardly from sidewalls 63 so as to flexibly secure the cap onto the mating screw or axle head of the toy.
- a window or void 87 is located through polymeric cover 83 and prefabricated insert 81 behind each finger 85.
- Such a void 87 is easily produced with the present three-dimensionally printing process even though this would otherwise create a die-lock condition requiring expensive and complicated slides in a conventional injection molding process.
- Figures 7-9 illustrate a nut part 101 including a prefabricated metallic insert 103 at least partially encapsulated by a three-dimensionally printed polymeric cover 105. More specifically, nut 101 is of a hat nut design including a laterally extending flange 107 having a circular peripheral surface 109, and a cylindrical periphery 1 1 1 for a body thereof. Insert 103 has a matching cylindrical periphery 1 13 and internal threads 1 15 about a through-bore 1 17.
- external periphery 1 13 of nut 103 may have a polygonal, fluted or other differently shaped surface to provide mechanical interlocking engagement with a matching internal surface of cover 105 while exterior surface 1 1 1 of cover 105 may still remain cylindrical or may be provided with a wrench-receiving generally polygonal shape.
- Polymeric cover 105 is preferably a Fullcure 720 printed material.
- a finished part 121 includes a transparent window insert 123 and a peripherally surrounding three- dimensionally printed polymeric bezel 125.
- This is ideally suited for use as a display in an electronic component such as a cellular telephone, hand-held PDA device, computer screen, television or the like.
- Bezel 125 extends around a peripheral edge 127 of insert 123 as well as one or both enlarged flat faces 129 thereof.
- a large central opening 131 is provided in bezel 125 to allow for viewing through insert 123. Additional smaller openings 133 and 135 can be provided within bezel 125 for camera, microphone or other electronic component access therethrough.
- Insert 123 is preferably a rigid member such as a prefabricated flat or curved glass sheet or alternately a prefabricated polymeric sheet.
- an electrical circuit part 171 includes prefabricated stamped electrical conductors 173 and a three- dimensionally printed polymeric insulator 175 at least partially encapsulating conductors 173.
- Conductors 173 further include bent electrical connectors 177 which may be of a box 179, U-shaped 181 or flat blade 183 shape extending beyond the printed polymeric insulator 175.
- bent electrical connectors 177 which may be of a box 179, U-shaped 181 or flat blade 183 shape extending beyond the printed polymeric insulator 175.
- This is an ideally suited manufacturing process for manufacturing such a circuit since there are no significant cooling temperature differences during curing of the polymeric insulator 175 verses the inserted conductors 173 as would otherwise occur in a conventional injection molding process which would lead to undesirable sink marks, internal voids and other such part imperfections due to the significant cooling differences and part thickness variations. But this is not a concern for a three-dimensionally printed insert molded part.
- Figures 17-19 show a woven fabric or textile insert part 201 entirely or partially encapsulated within a three-dimensionally printed polymeric cover 203.
- Both the textile insert 201 and polymeric cover 203 can be made of flexible materials to allow for stretching and bending, one can be flexible and the other can be generally rigid, or both may be generally rigid, depending upon the end uses. Alternately, a prefabricated wire mesh or spaced apart elongated fibers can be encapsulated in the printed material.
- a three-dimensional printing machine 1501 includes a support surface 1503 upon which a set of identical parts, for example, washer 31 and bezel/window 121 , are created.
- Machine 1501 further includes at least one ink jet printer head 1505, and preferably eight heads, which traverse side to side along one or more gantry rails 1507 by an electric motor or other automatically controlled actuators.
- the gantry rail also moves fore and aft above support surface 1503 along outboard tracks 1509, driven by an electric motor or other automatically controlled actuator.
- At least two storage tanks 151 1 or removable cartridges are connected to head 1505 via supply hoses 1513 in order to feed the same or different polymeric materials 1515 contained within each tank 151 1 to multiple ink jet printer openings 1517 in head 1505.
- Openings 1517 may constitute an array of 10 x 10 or even 100 x 1 00 nozzles, and more preferably 96 nozzles, arranged in a linear array such that multiple material flows are simultaneously emitted during a single head pass.
- the material is preferably an ultraviolet light-curable photopolymer in the form of a powder and water mixture.
- a spool containing an elongated and flexible string or filament of the polymeric material can be fed to the head, melted and emitted onto the support surface as a layered and continuous string.
- a computer controller 1519 having an input keyboard 1521 , an output display screen 1523, and a microprocessor, is connected to a central processing unit 1525 of machine 1501 to control the feed of material from tanks 151 1 and the actuator movement of head 1505 relative to support surface 1503.
- the machine user downloads a CAD file containing a design of the part into non-transient computer memory, such as RAM, ROM, a hard drive or removeable storage, associated with computer controller 1519.
- the user uses software instructions stored in the memory to digitally lay out the desired quantity of the parts onto support surface 1503 and position the parts in a manufacturing orientation, while adding any supports or pixel bridges to the design which are later removed after the manufacturing.
- the user also inputs the material(s) to be used in the manufacturing, whereafter the microprocessor in computer controller 1519 and CPU 1525 runs the software to cause head 1505 to begin its movement and material deposition in order to create the set of parts.
- ink jet printing openings 1517 emit streams of polymeric material 1515 and lay down a first layer, constituting a bottom external surface with a first transverse pass of head 1505, for 31 .
- This first pass lays down a material thickness of approximately 0.1 -1 .0 mm to create a face section of cover 35.
- One or more ultraviolet lights 1541 are attached to head 1505 which serve to emit light onto the layered material immediately after its deposition which binds together and cures the layer of material deposited.
- head 1505 After the first layer has been deposited for each of the multiple parts, head 1505 then emits a second layer of polymeric material 1515 upon the already deposited first layer which is then bound to the first layer when cured by lights 1541 . This layering and curing is repeated many times, until it reaches the condition shown in Figure 21 A.
- the head is then stopped and an operator (or automated robot) removes built up supporting materials and then places insert 33 onto the built up polymeric face surface in the partly produced cavity therein.
- the machine is subsequently reactivated as shown in Figure 21 C, to additively create additional printed polymeric layers thereon, for example, with more than fifty layers or head passes, until the part is fully created and light cured.
- the insert is integrally bonded to the printed polymer so the final cured part is a single piece.
- the insert can be adhesively coated in the areas to receive the printed polymer.
- removable supports may create a location within which the insert is later inserted, after removal of the supports, and the further additive print layering is thereafter performed.
- Material is deposited where computer controller 219 informs head that a wall or other polymeric formation is desired but head will print a removable (e.g., dissolvable) support material where a bore or other open area is present in the CAD drawing of the part.
- the polymeric material is stacked in many layers thereby creating the entire part as an integral and single piece part in an ambient and non-pressurized gaseous, particularly air, environment inside an enclosure of machine 1501 . In other words, the parts are all surrounded by air except for the first layer which contacts support surface 1503, during the entire manufacturing cycle.
- manufacturing or machine “cycle” refers to the time period from which the head begins depositing the first layer of material until when the head deposits the final layer of material for the completed part and is cured in the machine.
- the user manually removes the manufactured parts from support surface 1503, such as by use of a putty knife or other removal tool. At least forty parts are made in a single machine cycle, which is preferably less than ninety minutes.
- a jet or stream of high pressure water fluid is applied to each removed part which serves to dissolve any supports or bridges since they are made of a dissolvable material, different from the primary material defining walls of the part. Otherwise, the parts are removed from the printing machine in a fully cured state with no additional post-processing required.
- predetermined and entirely enclosed hollow spaces can be designed and manufactured inside thickened walls of any of the present parts in order to save material costs and weight.
- insert shapes or materials such as an engineering grade of polymer, for example, injection molded nylon, can be used as the prefabricated insert placed into the three- dimensional printing machine and becoming integrally one-piece with the finished component part.
- Any of the part functions, features and segments thereof may be interchanged with any of the other parts disclosed hereinabove, although certain benefits may not be realized. Nevertheless, such changes, modifications or variations are not to be regarded as a departure from the spirit and scope of the present invention.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13712637.1A EP2836352A1 (en) | 2012-04-10 | 2013-03-13 | Printed encapsulation |
JP2015505728A JP2015512816A (en) | 2012-04-10 | 2013-03-13 | Molding encapsulation method |
CN201380030652.3A CN104379324A (en) | 2012-04-10 | 2013-03-13 | Printed encapsulation |
IN9076DEN2014 IN2014DN09076A (en) | 2012-04-10 | 2013-03-13 | |
US14/391,745 US20150099087A1 (en) | 2012-04-10 | 2013-03-13 | Printed encapsulation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201261622146P | 2012-04-10 | 2012-04-10 | |
US61/622,146 | 2012-04-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013154723A1 true WO2013154723A1 (en) | 2013-10-17 |
Family
ID=47998532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2013/030717 WO2013154723A1 (en) | 2012-04-10 | 2013-03-13 | Printed encapsulation |
Country Status (6)
Country | Link |
---|---|
US (1) | US20150099087A1 (en) |
EP (1) | EP2836352A1 (en) |
JP (1) | JP2015512816A (en) |
CN (1) | CN104379324A (en) |
IN (1) | IN2014DN09076A (en) |
WO (1) | WO2013154723A1 (en) |
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JP2015134411A (en) * | 2014-01-16 | 2015-07-27 | 株式会社Ihi | Method for manufacturing three-dimensionally shaped article |
US10369636B2 (en) | 2014-04-17 | 2019-08-06 | Kennametal Inc. | Machining tool and method for manufacturing a machining tool |
US10646936B2 (en) | 2014-04-17 | 2020-05-12 | Kennametal Inc. | Machining tool and method for manufacturing a machining tool |
US10105769B2 (en) | 2014-04-17 | 2018-10-23 | Kennametal Inc. | Machining tool and method for manufacturing a machining tool |
WO2016055555A1 (en) | 2014-10-10 | 2016-04-14 | Arburg Gmbh + Co Kg | Method for the further processing of a prefabricated product, and associated prefabricated product |
DE102014220617A1 (en) * | 2014-10-10 | 2016-04-14 | Arburg Gmbh + Co Kg | Process for the further processing of a prefabricated product and associated prefabricated product |
US10717238B2 (en) | 2014-10-10 | 2020-07-21 | Arburg Gmbh + Co Kg | Method for the further processing of a prefabricated product, and associated prefabricated product |
US20180043618A1 (en) * | 2015-03-02 | 2018-02-15 | The Board Of Regents, The University Of Texas System | Embedding apparatus and method utilizing additive manufacturing |
EP3360668A4 (en) * | 2015-10-08 | 2018-10-10 | Mimaki Engineering Co., Ltd. | Three-dimensional object manufacturing method and manufacturing apparatus |
US11571849B2 (en) | 2015-10-08 | 2023-02-07 | Mimaki Engineering Co., Ltd. | Three-dimensional object manufacturing method and manufacturing apparatus |
US10702019B2 (en) | 2015-12-07 | 2020-07-07 | Nike, Inc. | Three-dimensional printing utilizing a captive element |
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EP3795334A1 (en) * | 2015-12-07 | 2021-03-24 | Nike Innovate C.V. | Three-dimensional printing utilizing a captive element |
CN111356571A (en) * | 2018-01-16 | 2020-06-30 | 惠普发展公司,有限责任合伙企业 | Three-dimensional printing system |
US11376797B2 (en) | 2018-01-16 | 2022-07-05 | Hewlett-Packard Development Company, L.P. | Three dimensional printing system |
US11602902B2 (en) | 2018-01-16 | 2023-03-14 | Hewlett-Packard Development Company, L.P. | Three dimensional printing system |
Also Published As
Publication number | Publication date |
---|---|
CN104379324A (en) | 2015-02-25 |
IN2014DN09076A (en) | 2015-05-22 |
JP2015512816A (en) | 2015-04-30 |
EP2836352A1 (en) | 2015-02-18 |
US20150099087A1 (en) | 2015-04-09 |
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